Background
Accelerometers measure levels of physical activity (PA) objectively, and they are being increasingly used to obtain information on PA in children.
Functional Data Analysis (FDA) is a statistical method that can be used to better characterise continuous activity patterns and their variation over time.
The objective of this study ...
Background
The study aim was to investigate whether it is possible to use the accelerometer of mobile phones as a valid and reliable tool for monitoring the physical activity.
Method
A specific mobile phone application to gather and record time varying acceleration was developed. The accelerometer integrated within two mobile ...
Background/Aims
Proponents of the Daylight Saving Bill currently under consideration in the UK parliament have hypothesised that extending afternoon daylight would promote child physical activity. Our aim was to investigate the relative contribution of day length and weather to children's physical activity, and the behavioural mediators underlying these effects.
...
Background
The mechanisms underlying the cardia-protective effects of physical activity in older adults remain poorly understood. We examined the relationship between objectively measured physical activity during free-living and novel cardiac risk markers, including coronary artery calcium (CAC) and pericardial fat (PF).
Methods
Participants were 446 healthy men and women (mean age=66±6 ...
The following fundamental research was not performed explicitly using an ActiGraph device. However, the theories developed in this paper are used extensively in ActiGraph’s ActiLife software.
Objective
Obesity rates in young children are increasing, and decreased physical activity is likely to be a major contributor to this trend. Studies ...
Introduction A tri-axis accelerometer has been extensively used in recent years. We report our recent evaluation of the usefulness of a three-axis accelerometer for sleep-wake scoring of healthy individuals and patients with sleep-disordered breathing (SDB).
Methods
Subjects
Seven healthy university students
4 men, 3 women, mean age of 21.1±0.7
Seven SDB patients
6 men, 1 ...
Background
Randomized controlled trials (RCT) are required to test relationships between physical activity and cognition in children, but these must be informed by exploratory studies. This study aimed to inform future RCT by: conducting practical utility and reliability studies to identify appropriate cognitive outcome measures; piloting an RCT of a 10 ...
The following fundamental research was not performed explicitly using an ActiGraph device. However, the theories developed in this paper are used extensively in ActiGraph’s ActiLife software.
Objective
As a standard method, periodic limb movements in sleep (PLMS) are detected by means of polysomnography (PSG). Actigraphic detection of PLMS is ...
The following fundamental research was not performed explicitly using an ActiGraph device. However, the theories developed in this paper are used extensively in ActiGraph’s ActiLife software.
Objective
To compare periodic leg movement (PLM) counts obtained with polysomnography (PSG) to those obtained from actigraphy with two devices (Actiwatch and PAM-RL).
...
The following fundamental research was not performed explicitly using an ActiGraph device. However, the theories developed in this paper are used extensively in ActiGraph’s ActiLife software.
Background and Purpose
To determine the accuracy of a new actigraphy system for the measurement of periodic leg movements (PLMs). Continuous measurements of ...